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Finding the Fourth Proportional to 493,729.20, 740,621.42 and 138,715.50

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Solution

The fourth proportional to 493,729.20, 740,621.42 and 138,715.50 is: 208,081.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,729.20 : 740,621.42 = 138,715.50 : x
  2. Step 2: Convert to fraction form
    493,729.20/740,621.42 = 138,715.50/x
  3. Step 3: Cross multiply
    493,729.20x = 740,621.42 × 138,715.50
  4. Step 4: Simplify right side
    493,729.20x = 102,735,670,586.01
  5. Step 5: Solve for x
    x = 102,735,670,586.01/493,729.20
  6. Step 6: Final answer
    x = 208,081.01

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.